Initial version.

src/nxt_job_resolve.c

@@ -0,0 +1,125 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ * Copyright (C) NGINX, Inc.
+ */
+
+#include <nxt_main.h>
+
+
+void
+nxt_job_resolve(nxt_job_resolve_t *jbr)
+{
+    int                 err;
+    u_char              *host;
+    size_t              len;
+    nxt_uint_t          n;
+    nxt_mem_pool_t      *mp;
+    nxt_sockaddr_t      *sa;
+    struct addrinfo     hint, *res, *r;
+    nxt_work_handler_t  handler;
+
+    #define NXT_BUFSIZE  64
+    u_char               buf[NXT_BUFSIZE];
+
+    handler = jbr->error_handler;
+    res = NULL;
+
+    len = jbr->name.len + 1;
+
+    if (nxt_fast_path(len <= NXT_BUFSIZE)) {
+        host = buf;
+
+    } else {
+        host = nxt_mem_alloc(jbr->job.mem_pool, len);
+        if (nxt_slow_path(host == NULL)) {
+            goto fail;
+        }
+    }
+
+    nxt_cpystrn(host, jbr->name.data, len);
+
+    nxt_memzero(&hint, sizeof(struct addrinfo));
+    hint.ai_socktype = SOCK_STREAM;
+
+    err = getaddrinfo((char *) host, NULL, &hint, &res);
+
+    if (err != 0) {
+        nxt_thread_log_error(jbr->log_level,
+                             "getaddrinfo(\"%s\") failed (%d: %s)",
+                             host, err, gai_strerror(err));
+        goto fail;
+    }
+
+    n = 0;
+    for (r = res; r != NULL; r = r->ai_next) {
+
+        switch (r->ai_addr->sa_family) {
+#if (NXT_INET6)
+        case AF_INET6:
+#endif
+        case AF_INET:
+             n++;
+             break;
+
+        default:
+             break;
+        }
+    }
+
+    jbr->count = n;
+    mp = jbr->job.mem_pool;
+
+    jbr->sockaddrs = nxt_mem_alloc(mp, n * sizeof(nxt_sockaddr_t *));
+    if (nxt_slow_path(jbr->sockaddrs == NULL)) {
+        goto fail;
+    }
+
+    n = 0;
+    for (r = res; r != NULL; r = r->ai_next) {
+
+        switch (r->ai_addr->sa_family) {
+#if (NXT_INET6)
+        case AF_INET6:
+#endif
+        case AF_INET:
+             break;
+
+        default:
+             continue;
+        }
+
+        sa = nxt_sockaddr_create(mp, r->ai_addr, r->ai_addrlen);
+        if (nxt_slow_path(sa == NULL)) {
+            goto fail;
+        }
+
+        jbr->sockaddrs[n++] = sa;
+
+        if (jbr->port != 0) {
+
+            switch (sa->u.sockaddr.sa_family) {
+            case AF_INET:
+                sa->u.sockaddr_in.sin_port = jbr->port;
+                break;
+#if (NXT_INET6)
+            case AF_INET6:
+                sa->u.sockaddr_in6.sin6_port = jbr->port;
+                break;
+#endif
+            default:
+                break;
+            }
+        }
+    }
+
+    handler = jbr->ready_handler;
+
+fail:
+
+    if (nxt_fast_path(res != NULL)) {
+        freeaddrinfo(res);
+    }
+
+    nxt_job_return(nxt_thread(), &jbr->job, handler);
+}